Sunlight delivers an average power flux of at the surface of the Earth

PHYSICS · Multi-part · GCSE · Physics · Energy · Energy

Problem

Sunlight delivers an average power flux of

1.36\times10^{3}\,\text{W m}^{-2}

at the surface of the Earth. A rectangular solar panel has an area of

2.50\times10^{1}\,\text{m}^{2}

and an overall efficiency of

1.8\times10^{-1}

. (a) Calculate the electrical power output of the panel under these conditions. (b) Express the power obtained in part (i) in kilowatts with the correct number of significant figures. (c) If the panel operates at this power for

3.60\times10^{3}\,\text{s}

, determine the total electrical energy generated and express it in scientific notation.

Related theory

Precision & Reporting
Power
Power (rate of doing work)
Work and Energy

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